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.table{ border-collapse:collapse;}.table td, .table th{ border:1px solid #cdcdcd; padding:5px;}Heat pipe solar collectorFeature:1.twin-glass evacuated tubes:Reliable, efficient, High temperature resistantanti-freezing.2.There is no water in the vacuum tube, it can still work even one tube is broken.3.red copper Heat pipe, f14x70 condensor,one-way transferring, fast heat transfer speed, less heat loss, low temperature resistance, it can be used in -35 degrees. 4.aluminum alloy manifold and bracket, corrosion resistance, easy to install. It can be installed both on flat roof and inclined roof5.